Window-shade roller



July 6 ,1923. I 1,591,104

' w. A. ROBINSON I I ymmow SHADE ROLLER Filed Augfisj 22, 1923 2' Sheeia-Slhat -2' 'means for automaticallygrelieving the inch line 8-8 of Fig.

. Fig.6 is an enlarg line 55 of Fig. 2..

line -6 of Fig.

i Fig. 9 is a SBCtlOll'Oll Patented July 6 192 v n UNITED TA WILLIAM A; ROBINSON; or LEICESTER,'nonrrrc'anonrnn,

' minnow-S ADE sesam -J Applicationtliled August 22, .1923, serialnogessyea This invention relates to curtains, and has particular reference "to a curtainfroller' of the kind which are used to support WllldOW shades and-the like, I

"The principal and most importantobjects of the invention are to improve the general tion, to. provide,

in such improved 'means tion at appropriate-times, and such other objects as W1ll be hereinafter apparent,

The invention consists in general of cer tain novel details of construction andcombinations of parts Whichvvill first 'be'jde scribed in detail, specifically pointed out in the claims and illustrated in the accompanying drawingswhereine V 1 v ,Fig. 1 is a perspective view of a Window shade roller "arrangement. Fig. 2 is a plan View thereof. P

Fig. 3 isa side elevation thereof;

Fig, 4 is an-enlargeddetail section on the line of Fig. {1.

detail section a on the Fig.6 is an enlarged detail section on ithe Fig.7 is an enlarged detail section on the Fig. Sis an enlarged the" line 99 of Fig. 7.

In the present embodiment of the invention it will be seen'that there is-provideda roller 10 ofthe usual elongated cylindrical form, and thisrollerfat one end-has a cap 11 Wherethrough passes a pintle12 forming a journal for thisend. This'pintle-lQ is supported. onsa'brac'ketv13 which isflto be mounted in the usual manner on the Wininserted in er is provided-a [cord Windingdrum 14C, and 'thisend of the roller is a pintle 15 forming a journal which is supported in a bracket 16 also securedto the frameF.

' This bracket 16 forms, in addition to a hearing for the pintle, a frictionplate, and on the outer'end of the drum 1& is carried screw thread 23,

and its frame equippedthe improved detail section on the a awfriction disk ITWhieh engages 'against one sidecf the bracket 16' Oaths-m nal 15 is also mounted a second cord wind i-ng'drum 18, wh ch hasiin' its inner end a recess 19 receiving a nut 20 having a Q,

steeply pitched-thread therein engaging a? 1 correspondingthreadQl formed onthe outer end of the journal 15. The outer" end of the r-cord Winding drum 18"is' likewisere- T 4 cessedes at22, and the extremity of the journal15 isprovided with an ordinary screwed thereon. Betweenthe nut2 1, which ispreferabl recessed at its inner end,iand' so that'a' nut ?A may be 7 thebottom. of the'recess 22 is agspring'25; I The inner face of the drum 22lis provided On thedrum 14L is Wound'lone endof an is oundQ-the other" end or this operating with"adhesion diskI Qd-like the ;friction" disk 171, andlike crigagi'ngthe bracket operating cordf27,- While'on'the drum 18 These ends are Wound in opposite Y l1'rections; the cord on the drum 18being wound in the same directionfas the thread 1 On 'thefljournal 15. The middle or bight j portion of this cord. hangsdown and passes through H a'pulley 28 to Whichjis attached a tension spring 29 secured tojaQpin for screW 30 PIOJQCUIIg fiYOIXI the ndow frame or 'caslng F. "By. this imeans the cord 7 26 is: kept in constant: tension. On -,the i rollerflO is wound the usualcurtain 31. Y I "In" operation it Will be seen that the frictional engagement of the friction disks wit-lithebracketinay be varied at Will i V increasing'or decreasing the tension offthe spring 25 through the manipulationzof the Also it will be obvious that when nut :24.

the cord is pulled injone directionthe cur-V tainfivill gbe Wound up, and that when ,the

cord vis 'p ulled in the oppo'site'direction, the,

curtain] will be unwound. V Vhenev er the cord is pulled in either direction'it is to bethe friction between 1 particularly: noted that the disks and the bracket 16 ,is reduced by reason of the-l facjt that this pullingof the cord tends to cause relative movement bem direction as to compress the spring251totween the vnut 20 and the journal 15 in such Ward the nut 24:, and1 this causes in'turn; a

tendency of the'friction'disks 17 and-26 to Y separate and thereby relieve frictional pres sure on the bracket 16.

While the form just described is as ie ferred form, it is not to'be understood that the device is confined to the. exact construction herein shown and described,-but it is to be understood that it is the intent of the invention to cover all such variations as may be made by those skilled in the art and which come within the scope claimed. I

I claim:

1. A device of the kind described com prising a curtain supporting roller'having a journal at one end, a bracket iorming a bearing for said journal, cord winding drums carried by said journal to revolve therewith and located on opposite sides of the bracket to frictionally engage said bracket, the inner drum being fixed to the journal and the outer 'drum'being revoluble thereon, and a cord having one end wound in one direction on'one of said drums and its other end wound in the opposite direction on the remaining drum.

2. A device oi the kind described comprising a curtain supporting roller having a journal at one end, a bracket forming a bearing for said journal, cord winding drums carried by said journal to revolve therewith and located on opposite'sides of the bracket to frictionally engage said bracket, the inner drum being fixed to the journal and the'outer drum beingrevoluble thereon, variable pressure means carried by said journal and engaging the outer one of said drums to regulate the-friction between the drums and bracket, and a cord having one end-wound intone direction on-one of said drums and its other end wound in the opposite direction on the remaining drum.

3. A device of the kind described comprising a curtain supportinglroller having a journal at one end, a bracket'formin'g a bearing for said journal, cord winding drums carried by 'said journal to revolve therewith and located on opposite sides of the bracket to frictionally engage said racket, a nut screwed on the end of said journal, a spring interposed between said nut and the outer one of said drums, the last mentioned druinbeing movable along said journal and the other drum being fixed with respect to the journal, and a cord having one end wound in-one direction on one of said drums and its other end wound in the opposite direction on the other drum. 4. A device of the" kind described com prising a curtain supporting roller having a journal at one end, a bracket forming a bearing for said journal, cord winding drums carried by said journal to revolve therewith and located on opposite sides of the bracket to frietionally engage said bracket, variable pressure means carriedlbyr said journal and engagingtheouter one of said drums to regulate the iriction between the drums and bracket, a cord having one end wound in one direction on one of sa1d drums and its other end wound in the 0pposite direction on the remaining drum, and means for automatically relieving pressure between the drums and bracket actuated by pulling upon said cord.

5. A device of the kind described comprising a curtain supporting roller having a journal at one end, a bracket forming a bearing for said journal, cord winding drums carried by said journal to revolve therewith and located on opposite sides of the bracket to frictionally engage said bracket, a nutserewed on the end of sa1d lieving the pressure between said drums and bracketupon pulling on said cord.

6. A devlce of the kind described comprising a curtain supporting rollerhaving a journal at one end, a bracket forming a bearing for said journal, cord winding drums carried by said ournal to revolve therewith and located on opposite sides of the bracket to 'frictionally engage said i bracket, a nut screwed on the end of said journal, a spring interposed between said nut and the outer one of said drums,"the last mentioned drum being movable'along said journal and the other drum being fixed with respect to the ournal, acord having one end wound infone direction on one of said drums and its other end wound in the opposite direction on the other drum, a nut carried by the spring pressed drum,

a-thread 011 said journal engaged by said nut, the pitcher the thread and; nut being" Vsuflicient to cause relative movement bejournal tween the nut' and drum andthe uponpulhng SHJd'COl'Cl. v

In testimony whereof I 'aflix my signa ture. i

WILLIAM a; noBmsonMtn 

